| package client |
| |
| import ( |
| "errors" |
| "fmt" |
| |
| "golang.org/x/net/context" |
| |
| Cli "github.com/docker/docker/cli" |
| "github.com/docker/docker/pkg/jsonmessage" |
| flag "github.com/docker/docker/pkg/mflag" |
| "github.com/docker/docker/reference" |
| "github.com/docker/docker/registry" |
| "github.com/docker/engine-api/client" |
| "github.com/docker/engine-api/types" |
| ) |
| |
| // CmdPull pulls an image or a repository from the registry. |
| // |
| // Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST] |
| func (cli *DockerCli) CmdPull(args ...string) error { |
| cmd := Cli.Subcmd("pull", []string{"NAME[:TAG|@DIGEST]"}, Cli.DockerCommands["pull"].Description, true) |
| allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository") |
| addTrustedFlags(cmd, true) |
| cmd.Require(flag.Exact, 1) |
| |
| cmd.ParseFlags(args, true) |
| remote := cmd.Arg(0) |
| |
| distributionRef, err := reference.ParseNamed(remote) |
| if err != nil { |
| return err |
| } |
| if *allTags && !reference.IsNameOnly(distributionRef) { |
| return errors.New("tag can't be used with --all-tags/-a") |
| } |
| |
| if !*allTags && reference.IsNameOnly(distributionRef) { |
| distributionRef = reference.WithDefaultTag(distributionRef) |
| fmt.Fprintf(cli.out, "Using default tag: %s\n", reference.DefaultTag) |
| } |
| |
| var tag string |
| switch x := distributionRef.(type) { |
| case reference.Canonical: |
| tag = x.Digest().String() |
| case reference.NamedTagged: |
| tag = x.Tag() |
| } |
| |
| ref := registry.ParseReference(tag) |
| |
| // Resolve the Repository name from fqn to RepositoryInfo |
| repoInfo, err := registry.ParseRepositoryInfo(distributionRef) |
| if err != nil { |
| return err |
| } |
| |
| authConfig := cli.resolveAuthConfig(repoInfo.Index) |
| requestPrivilege := cli.registryAuthenticationPrivilegedFunc(repoInfo.Index, "pull") |
| |
| if isTrusted() && !ref.HasDigest() { |
| // Check if tag is digest |
| return cli.trustedPull(repoInfo, ref, authConfig, requestPrivilege) |
| } |
| |
| return cli.imagePullPrivileged(authConfig, distributionRef.String(), "", requestPrivilege) |
| } |
| |
| func (cli *DockerCli) imagePullPrivileged(authConfig types.AuthConfig, imageID, tag string, requestPrivilege client.RequestPrivilegeFunc) error { |
| |
| encodedAuth, err := encodeAuthToBase64(authConfig) |
| if err != nil { |
| return err |
| } |
| options := types.ImagePullOptions{ |
| ImageID: imageID, |
| Tag: tag, |
| RegistryAuth: encodedAuth, |
| } |
| |
| responseBody, err := cli.client.ImagePull(context.Background(), options, requestPrivilege) |
| if err != nil { |
| return err |
| } |
| defer responseBody.Close() |
| |
| return jsonmessage.DisplayJSONMessagesStream(responseBody, cli.out, cli.outFd, cli.isTerminalOut, nil) |
| } |